On January 13, the Electronic Privacy Information Center (EPIC) issued a letter to the Transportation Security Administration and lawmakers regarding the TSA’s recent decision to make airport body scans a mandatory procedure.

The coalition, which includes the Electronic Frontier Foundation (EFF), the American Civil Liberties Union (ACLU), and anti-biometrics group the Constitutional Alliance, said they were writing to Congress “regarding the TSA’s recent claim that it can mandate whole body scanning for airline passengers.”